method

jd_to_commercial

v1_8_6_287 - Show latest stable - Class: Date

jd_to_commercial(jd, sg=GREGORIAN)

public

Convert a Julian Day Number to a Commercial <a href="/ruby/Date">Date</a>

jd is the Julian Day Number to convert. sg specifies the Day of Calendar Reform.

Returns the corresponding Commercial <a href="/ruby/Date">Date</a> as [commercial_year, week_of_year, day_of_week]

# File lib/date.rb, line 446
  def self.jd_to_commercial(jd, sg=GREGORIAN)
    ns = fix_style(jd, sg)
    a = jd_to_civil(jd - 3, ns)[0]
    y = if jd >= commercial_to_jd(a + 1, 1, 1, ns) then a + 1 else a end
    w = 1 + ((jd - commercial_to_jd(y, 1, 1, ns)) / 7).floor
    d = (jd + 1) % 7
    d = 7 if d == 0
    return y, w, d
  end

jd_to_commercial

Related methods